The remote host contains a version of the Indexing Service which is
vulnerable to a security flaw which may allow a possible hacker to execute
arbitrary code on the remote host by constructing a malicious query.

Solution :

Microsoft has released a set of patches for Windows NT, 2000, XP and 2003 :

http://www.microsoft.com/technet/security/bulletin/ms05-003.mspx

Threat Level:

High / CVSS Base Score : 8
(AV:R/AC:H/Au:NR/C:C/A:C/I:C/B:N)

Click HERE for more information and discussions on this network vulnerability scan.